Sherwin HM-2D Fluorescent Water-based Penetrant Level 1

Description HM-2D is a low sensitivity, water•washabIe fluorescent penetrant for inspecting castings, extrusions, and similar parts. A versatile, general purpose penetrant; may be used on a variety of materials, including aluminum and magnesium castings. Compiles with low-sulfur and low-halogen requirements. OSHA Class llIB material. Flash point over 200°F.

Special Features: HM-2D is fully approved. lt has been formulated to meets the needs of the nonferrous metal casting industry.

HM-2D is an approved MlL•I-25135-D & E and AMS-2644 material. The Sherwin laboratory was the first to recognize the need for high flash point, stable, nonvolatile, low toxicity penetrants.

HM-2D is a production material with the following characteristics.

1. Low to near zero background for assured indication visibility.
2. Sharp, precise flaw indications or rapid interpretation,
3. Excellent electrostatic spray capability has been demonstrated.
4. Long material tank life due to formula stability and nonvolatility.
5. Low material consumption (low drag out) due to low viscosity.
6, Clean, relatively odorless product; vapor free atmosphere.
7. Recognized and accepted as a low toxicity material by health authorities.
8. Use without developers where specifications permit. _

HM-2D meets all military and applicable commercial specifications. Full conformance certification documentation complying with MIL-STD-6866, ASTM E-1417 and other applicable specifications are provided with each shipment.

Companion Materials:

Developers

• Sherwin D-QOG.1 Dry Powder (form a)
• Sherwin D-100 Nonaqueous (form d)
• Sherwin D-106 Nonaqueous (form d)
• Sherwin D-110A.1 Water Suspendable (form c) equivalent MIL-I-25135/AMS-2644 developers

Removers

• Sherwin DR-60 (Class 2)
• Sherwin DR-62 (Class 2)
• equivalent MIL-l•25135/AMS-2644 removers

Basic Instructions (These instructions describe the basic process, but they may need to be amended by the user to comply with applicable specifications and/or inspection criteria provided by the contracting agency.)

1. Application: Apply HM-2D only to clean, dry surfaces by spraying, flowing, brushing or dipping.
2. Dwell-Time: A 10 minute dwell time is suggested, although in many cases live minutes will suffice. When particularly tight cracks are suspected, or the part is especially critical, the dwell time may be extended to 30 minutes. or longer.